Mobile phone auto registration to OpenBTS-based cellular network in disaster situation

When disasters occurs, cellular network might be down and cannot serve subscribers anymore. On the other hand, many victims trapped in a wreckage might still have access to their mobile phone. An OpenBTS-based cellular network has been long before known as an ideal solution to rapidly deploy emergency GSM cellular network in situation after disaster. The problem arise when victims´ mobile phone only associated to the providers´ network where the SIM card come. Even though it can manually associate to available network in an emergency situation, but victims´ situation and knowledge might prevented them in doing that. In this work we propose method to enable mobile phones automatically associates themselves to OpenBTS-based cellular network.